Patent Number: 7,825,810

Title: RFID tag read system and method of reading RFID tag

Abstract: A RFID tag read equipment includes a read device and an antenna system including first to third antennas. The read device outputs the question wave as a high-frequency current, and reads the predetermined data by demodulating the answer wave when the answer wave is inputted therein as a high-frequency current. The first to third antennas output the high-frequency current when they receive the electromagnetic wave, and radiate the electromagnetic wave when the high-frequency current is inputted therein. Here, the first antenna is connected to the read device via a feeder wire, the second antenna being located such that its radiation direction is made parallel and opposite to radiation direction of the first antenna, the third antenna being connected to the second antenna via a feeder wire.

Inventors: Sakama; Isao (Hiratsuka, JP), Ashizawa; Minoru (Tokyo, JP)

Assignee: Hitachi, Ltd.

International Classification: G08B 13/14 (20060101)

Expiration Date: 2019-11-02 0:00:00